Perhaps you should try some spelling variations:
trung thanh » truong thanh
chieu sang » chieu sach, chieu xanh, hieu lang
doi chieu » doc hieu, doi chi, ho chieu
tang luan » dung luan
dung cong » dung trong
manh toan » thanh toan, anh tuan, tinh toan
dan toan » van toan, dan than, xuan toan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sang - hanh ((tang luan) or (trung thanh)) dung cong ((dan toan) OR (manh toan)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - hanh ((tang luan) OR (trung thanh)) dung cong ((dan toan) OR (manh toan)) tap*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sang - hanh ((tang luan) or (trung thanh)) dung cong ((dan toan) OR (manh toan)) tap*".